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alsa: added comments

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Document alsa_data members.
This commit is contained in:
Max Kellermann 2009-01-25 13:13:24 +01:00
parent fb3e43ed73
commit 7cc15ffc08
1 changed files with 23 additions and 5 deletions
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28
src/output/alsa_plugin.c
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@ -41,18 +41,36 @@ typedef snd_pcm_sframes_t alsa_writei_t(snd_pcm_t * pcm, const void *buffer,
snd_pcm_uframes_t size); snd_pcm_uframes_t size);
struct alsa_data { struct alsa_data {
/** the configured name of the ALSA device; NULL for the
default device */
char *device; char *device;
/** use memory mapped I/O? */
bool use_mmap;
/** libasound's buffer_time setting (in microseconds) */
unsigned int buffer_time;
/** libasound's period_time setting (in microseconds) */
unsigned int period_time;
/** the mode flags passed to snd_pcm_open */ /** the mode flags passed to snd_pcm_open */
int mode; int mode;
/** the libasound PCM device handle */
snd_pcm_t *pcm; snd_pcm_t *pcm;
alsa_writei_t *writei;
unsigned int buffer_time;
unsigned int period_time;
size_t frame_size;
bool use_mmap;
/**
* a pointer to the libasound writei() function, which is
* snd_pcm_writei() or snd_pcm_mmap_writei(), depending on the
* use_mmap configuration
*/
alsa_writei_t *writei;
/** the size of one audio frame */
size_t frame_size;
/** the mixer object associated with this output */
struct mixer mixer; struct mixer mixer;
}; };